<template>
  <div class="about">
    <h1>{{ id ? '编辑' : '新建'}}分类</h1>
    <el-form label-width="120px" @submit.native.prevent="save">
      <el-form-item label="上级分类">
      <el-select v-model="model.parent" placeholder="请选择">
      <el-option v-for="item in parents" :key="item._id" :label="item.name" :value="item._id"></el-option>
      </el-select>
      </el-form-item>
      <el-form-item  label="名称">
        <el-input v-model="model.name" placeholder="请输入名称"></el-input>
      </el-form-item>
      <el-form-item>
        <el-button type="primary" native-type="submit">保存</el-button>
      </el-form-item>
    </el-form>
  </div>
</template>
<script>
export default {
  props : {
    id : {}
  },
  data (){
    return {
      model : {},
      parents : []
    }
  },
  methods : {
    async save() {
      let res
      if(this.id)
      {
        res = await this.$http.put(`rest/categories/${this.id}`,this.model)
      }else{
        res = await this.$http.post('rest/categories',this.model)
      } 
      
      this.$router.push('/categories/list')
      this.$message({
        type : 'success',
        message : '保存成功'
      })
      
    },
    async fetch() {
      const res = await this.$http.get(`rest/categories/${this.id}`)
      this.model = res.data
    },
    async fetchparents() {
      const res = await this.$http.get(`rest/categories`)
      this.parents = res.data
    }
  },
  created() {
    this.fetchparents()
    this.id && this.fetch()
  },
}
</script>